Temperature control for heating systems



Feb. 9, 1954 R. R. WILLIAMS TEMPERATURE CONTROL FOR HEATING SYSTEMS Filed June 6, 1952 ATTORNEY -HAU Patented Feb. 9, 1954 TEDH-ERNIUREGONTROE'v FIORE-HE ATING SYSTEM Richard; RaymnndiWilliams, iChevytGhaseffMda Applicationuune"6;1952, Sei'iallrlci92,1237 f 6 (C1. Zarges.;

las' ThisH-inventiony relates to:im-provernents` .in temperature vrcontrols-foitv heating systems .of. the character-@used particularly' yfor heatingwlarger.

buildings 'such as apartment units byl a hot-water f 5 h atingA system-.1'

Inz such Yhea-ting systems'- as usedyheretof orey' in 1l order to-provide therproper type off-|control-fo`r both 'day Vand -night heatingof-a multiplicity :of-Ll units, anr elaborate controlf-systemehas been' nec-v10 essary,-frequently requiring the use vofseparate' boilers for-both* daytime Yand Anightloperatiena` Eventhen-'a separate'domestic' hot water-system usuallyy was required'fu2 Olne-objectief this invention isfto simplify'and;-15

Another Yobjecteof th-isinvent-ion-is to provider@ for daygand night operation-*of1 thetrooml heatingv system supplied by' a single'4 boiler which*rnay'jbeE` maintained sufficiently hot alsorto'supply' domesi' ticjhot-Water to-th'e Vapartment-units'supplied 25 thereby.viv

Still another obj ectofthis inventionfis to utilize?"- the return' pipe-,for thehot4 Water heating 'system' as the source of control'ior" the system'whereby a uniformity ofv temperature' will- 'bermainta'ined 'i therein more efectivelygand completely than '30 Wouldlbe possible pthervvise.A

Another objectf this invention is'to' providev a temperature control systemfor' a hot Water heat ingl system which may be lconstructedatlow cost` and installed in .present domestic hotwater heat-f' 35 ing systems Without requiring material modification thereof. p

Tli'ese objects may be accomplished according to onezembodiment cfs..thi's;inventio`n byzconnecte ing the controlrfsystemewithethefreturnrpipe for 40 the hotwater line to respond to the temperature therein for controlling the pump that forcesjtlrre; Wateritliroughthe' system; Oneor'more thermo= statsl ;are,.,provided, preferablyiseparate thermo:V

stats for, day and nightoperation, which Linlturn,

control the pump according' to the'temperature of the Water in the return pipe. This will give a uniform temperature in all parts of the building and it will serve also to allow the same boiler to be used for both day and night operation, as well as for heating hot Water in the domestic hot Water supply. Moreover, it serves to provide a uniform temperature in the boiler which may be maintained relatively high at all times.4

This embodiment of the invention is illustrated in the accompanying drawings, in which:

Fig. l is a diagrammaticfvieweof the.-electricalS control -system; and

Figiy 2 is a diagrammatic view\fillus'trating the-s pumrrandA boiler unit-connected in'-heatingtandhot Water-systems;

Referring firstlto L'Biggi-2, I havewillustrated-#a f conventional'H -form of boiler `designated 'byftheef numeral vI beingofthe-hot- Water lheating-type` adapted for use in a hotlwater-heatingsystemr; suchf as umaybe employedrin a "multiplicitytof apartment funits: An outlet pipe is shown: at 2 toA if supply# hot Water'to the respective radiatorsf-Z" orl the multiple apartment 'units'andthereturn pipe/f isshown aatt, :leadin'gvback to they boiler'fIvl from"4 the yradiator"system'. The boiler-lmay beadaptedif desired; td'supe' plyheat by a: piped to-a tank'or 'otheridomesticv hot water supply tankll) having a coil 2 I- therein; Which 'coil 2 I y' is 'connected' by'the pipe` i4' and by Y. a return" pipe' -witirthel Vboiler -I "said, tank"`20;"; beingconn'ectedzin theusualWay :witlrthe hot Water ksystemvof the; apartment `'units'.

The return pipe 3 is provided witliapump '.5 therein for forcing. the .Water backto the boiler .I under pressure... Thi's.pu mp 5 is operated bya t. motor'fusually 1an ,electricmotor. Tlieimotors iscontrolled bya starter unit 1. includingla relay,m switch, connected with a povvercontrol.,switch'l adapted 'for connectionY AWithla pow,er. line 8,.1 usuallyfofvZZOv.

Day and ,night thermostatslare shojwn Aat .9. and, I U, 'respectivelygwhich .arein the formof. Aqua.... stats," responding.,..to .,.the temp.erature. of the Water in'thereturn pipe. 3,With which theseitherf... mostats lare .connectedw v. Such. thermostats.-.. are Well known and usually' mayibe adjusted.individ.. ually' to diierent'settingsrom0fto,220?.

One sidejof ,the f daylthermostat 9 is I shown las connected through a line. I I to va time controlled.; switch JI 2;' whileitheopposite .side .of .the thermoa. stai-9. ismconnectedthrougha line..l3, leading to. theA erelaysswitch in ,.the, starter. .control .uniteA 1. The..line I3v iscommonto both..;thermostats .9 and. I0., `as shown .in .Fig1. i Theoppositesideot-them. thermostat Iii. is, connected .throughz a line A l Il` directly with the starter control unit l.

The time control switch I2 is connected with a fuse box generally indicated at I5, which in turn is supplied With a source of electric current such as v., generally indicated at I6.

The pump 5 will circulate hot Water through the heating system and to the boiler I when this pump is operated by the energizing of the motor -6. The pump is located in the return pipe of the hot water system, and the latter is utilized also as the source of control for the operation of the pump by the connection of the day and night thermostats in the return pipe 3, which latter are utilized for controlling the operation of the pump to maintain the temperature of the heating system which thereby maintains an even temperature in the system at all times and enabling the temperature in the boiler I to be maintained at a maximum point so that the same boiler may be used for heating the hot water supply coil liY of the domestic hot water system.

This temperature control may be used for any number of different apartment units and yet all of these may be heated and controlled in connection with a single boiler for both day and night operation as well as the supply ofV domestic hot water. At the same time, only two thermostats are required which may be set manually or controlled by the time clock l2, as desired. Where the latter is used, only one setting is all that is required for a heating season.

Where this temperature control is installed in place of any other control system, the only change needed is to balance the heating system which may be done by anyone having some knowledge of heating systems, and the installation of the necessary units, as here described. The installation cost is very low relatively due to the simplicity of the system.

This temperature control has been proven to effect a very substantial saving in fuel consumption as a result of the utilization of the return pipe for controlling the temperature of the hot water heating system. At the same time, it does not require a separate boiler for night operation, but one boiler may be used for both day and night operation as well as for domestic hot water supply.

While the invention has been illustrated and described in one embodiment, it is recognized that variations and changes may be made therein without departing from the invention as set forth in the claims.

I claim:

l. In a water heating system including a water heating boiler and a water circulating room heating system connected therewith including a return pipe extending to the boiler, the combination with a pump connected in the return pipe for forcing the water therethrough to the boiler, of separate day and night thermostatic controls connected with the return pipe and responsive to the temperature of the return water therein and respectively controlling the action of the pump, and a time control connected with the thermostatic controls for controlling the connection thereof with the pump selectively.

2. In a water heating system including a water heating boiler and a water circulating room heating system connected therewith including a return pipe extending to the boiler, the combination with a pump connected in the return pipe for forcing the water therethrough to the boiler and having an electric motor for operating said pump, of a starting switch connected with the motor for connecting a source of power there- 4 with, day and night thermostatic controls connected with the return pipe and respectively connected with the starter switch for controlling the latter in response to temperature conditions of the water in the return pipe, and a time control switch for selectively connecting the thermostatic controls with the starter switch.

3. In a water heating system, lthe combination with a water heating boiler and a water circulating room heating system connected therewith including a return pipe extending from the room heating system to the boiler, of a pump connected in the return pipe for forcing the water to the boiler, separate day and night thermostatic controls having time controlled means connected therewith and connected with the pump and responsive to the temperature of the Water in the return pipe for controlling the water circulating room heating system.

4. In a water heating system, the combination with a water heating boiler and a water circulating room heating system connected therewith including a return pipe extending from the room heating system to the boiler, of a pump connected in the return pipe for forcing the water to the boiler, separate day and night Aquastats in heat exchange relation with the return pipe, and time controlled means for connecting said Aquastats with the pump and controlling theY water circulating room heating system.

5. In a water heating system, the combination with a water heating boiler and a water circulating room heating system connected therewith including a return pipe extending from the room heating system to the boiler, of a pump connected in the return pipe for forcing the water to the `boiler, electric power means for operating said Y pump, control means for the electric power means including separate day and night Aquastats in the return pipe, and time controlled means connecting the Aquastats respectively with the electric power means.

6. In a water heating system, the combination with a water heating boiler and a water circulating room heating system connected therewith including a return pipe extending from the room heating system to the boiler, of a pump connected in the return pipe for forcing the water to the boiler, separate day and night thermostatic controls having time controlled means connected therewith and Connected with the pump and responsive to the temperature of the water in the return pipe for controlling the water circulating room heating system, and domestic hot water heating means connected with the boiler and heated thereby.

RICHARD RAYMOND WILLIAMS.

References Cited in the ille of Ythis patent UNITED STATES PATENTS l Date 

